I was deeply shocked and saddened to hear about the death of Barnaby Jack, one of the most brilliant and effective security researchers I have ever encountered. He researched vulnerabilities in everyday devices such as ATMs with an extraordinary level of flair and imagination. Unlike other researchers, Barnaby always created an immediate impact because of his compelling presentations. He will be sadly missed by the whole of the security community.
PS - It's good to see that the Daily Telegraph saw fit to publish a formal obituary for Barnaby, an honour they reserve for the "the good, the bad and the simply famous".